export default  {
	"title": 'Java语言程序设计_在线2',
	"testId": '63776',
	"praxiseList": [
		{
			"id": 84428,
			"title": "下列哪种语言编写的程序可以“一次编译，跨平台运行”？",
			"options": "[\"C++语言\",\"C\\/C++\\/Java语言都可以\",\"C语言\",\"Java语言\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84429,
			"title": "Java语言与C/C++语言在下列哪个方面存在明显区别？",
			"options": "[\"运算符\",\"表达式\",\"数据类型\",\"输入\\/输出\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84430,
			"title": "搭建Java SE8开发环境需分4步，其中的第3步是下列哪一项？",
			"options": "[\"安装JDK 8\",\"下载JDK 8安装包\",\"验证安装\",\"设置环境变量\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84431,
			"title": "每周有7天，为星期一～星期日分别赋予一个整数编码。使用十进制只需1位编码就够了，例如0～6。使用二进制最少需要几位编码？",
			"options": "[\"4\",\"2\",\"3\",\"1\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84432,
			"title": "Java语言中没有下列哪种数据类型？",
			"options": "[\"unsigned int\",\"boolean\",\"byte\",\"short\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84433,
			"title": "Java语言中下列哪种数据类型的存储位数与char类型一样多？",
			"options": "[\"double\",\"short\",\"int\",\"byte\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84434,
			"title": "Java语言中下列哪种数据类型的存储位数与long类型一样多？",
			"options": "[\"byte\",\"int\",\"short\",\"double\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84435,
			"title": "Java源程序中，下列哪个整数的数值最小？",
			"options": "[\"015\",\"15L\",\"0x15\",\"15\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84436,
			"title": "执行Java语句“int x = 5;  double y = 10.5;  y -= x / 2.0;”之后，变量y的值为（  ）。",
			"options": "[\"8\",\"2.25\",\"5\",\"8.5\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84437,
			"title": "Java表达式“5 <= 5”，该表达式结果的数据类型和值分别是（  ）。",
			"options": "[\"int，true\",\"int，0\",\"boolean，true\",\"boolean，false\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84438,
			"title": "Java表达式“1 >= 0 && 0 <= 1”的结果是（  ）。",
			"options": "[\"true\",\"1\",\"false\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84439,
			"title": "执行Java语句“if (1 < 0 || false)  System.out.print(“Hello world!”);”显示器上将显示（  ）。",
			"options": "[\"什么都没显示\",\"Hello world!\",\"Hello, world!\",\"\\\"Hello world!\\\"\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84440,
			"title": "按照面向对象程序设计的观点，下列关于对象描述中错误的是（  ）。",
			"options": "[\"同一个类所定义出的两个内存对象可以有不同的成员\",\"程序中用类定义出的对象被称作内存对象\",\"客观世界中的事物被称作客观对象\",\"类是描述客观对象的数据模型\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84441,
			"title": "关于面向对象程序设计方法，下列哪种描述是错误的？",
			"options": "[\"面向对象程序设计方法更便于代码分类管理\",\"面向对象程序设计方法中的类是客观事物抽象后的数据模型\",\"面向对象程序设计方法是当今程序设计的主流方法\",\"面向对象程序设计方法所设计出的类代码不能重用\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84442,
			"title": "假设编写一个教务管理系统，通过分析可抽象出若干个类，其中不应当包括下列哪个类？",
			"options": "[\"教师类\",\"课程类\",\"学生类\",\"宿舍类\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84443,
			"title": "如果将客观世界中的钟表抽象成一个钟表类，其中不应当包含下列哪个成员？",
			"options": "[\"时、分、秒\",\"显示时间\",\"设置时间\",\"功率\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84444,
			"title": "下列关于类定义语法的描述中，错误的是（  ）。",
			"options": "[\"类的访问权限有4种\",\"类成员包括字段成员和方法成员两种\",\"类成员的访问权限有4种\",\"定义类时需使用关键字class\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84445,
			"title": "下列关于对象引用的描述中，错误的是（  ）。",
			"options": "[\"一个对象可以被多个引用变量同时引用\",\"引用变量在引用一个对象之后不能改变引用，再引用其他对象\",\"运算符new在创建对象后将返回该对象的引用\",\"当一个对象不被任何变量引用时，其内存单元将被Java虚拟机收回\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84446,
			"title": "下列关于参数传递的描述中，错误的是（  ）。",
			"options": "[\"Java语言中，当返回值是引用数据类型时返回的是对象引用\",\"引用传递后，形参和实参将引用不同的对象\",\"Java语言中方法间传递引用数据类型数据时传递的是对象引用，即引用传递\",\"Java语言中方法间传递基本数据类型数据时直接传递数值，即值传递\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84447,
			"title": "下列关于构造方法的描述中，错误的是（  ）。",
			"options": "[\"构造方法没有返回值，其返回值类型应当写void\",\"构造方法的名字必须与类名相同\",\"构造方法可以重载，这样可以提供多种形式的初始化方法\",\"构造方法通过形参传递初始值，实现对新建对象字段成员的初始化\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84448,
			"title": "定义一个包含3个元素的char型数组x，下列哪种写法是正确的？",
			"options": "[\"char x = new char[3];\",\"char x[3];   x = new char[ ];\",\"char x = new char(3);\",\"char x[ ];   x = new char[3];\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84449,
			"title": "下列关于对象数组的描述中，错误的是（  ）。",
			"options": "[\"对象数组中的每个元素都是一个对象引用\",\"可以访问对象数组中的数组元素\",\"可以访问对象数组中数组元素的下级成员\",\"对象数组中的每个元素都是一个对象\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84450,
			"title": "下列关于Java程序文件的描述中，错误的是（  ）。",
			"options": "[\"Java源程序文件的扩展名是“.java”，类程序文件的扩展名是“.class”\",\"一个Java源程序文件中可以定义多个类，但其中最多只能有一个public类\",\"编译后，一个Java源程序文件只会生成一个同名的类程序文件\",\"一个Java项目可以包含多个Java源程序文件\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84451,
			"title": "下列关于Java包的描述中，错误的是（  ）。",
			"options": "[\"Java类的包名就是其源程序文件所在的子目录名\",\"对Java类分包管理就是将类的程序文件放入不同子目录进行分组管理\",\"package语句可以放在源程序代码的任意位置\",\"package语句的作用是向Java编译器声明本文件中类所在的包名\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84452,
			"title": "访问定义在public类中的默认权限成员，下列哪种访问是错误的？",
			"options": "[\"在本类中访问\",\"在不同包的类中访问\",\"在同一文件的类中访问\",\"在同一包的类中访问\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84453,
			"title": "访问定义在默认权限类中的public成员，下列哪种访问是错误的？",
			"options": "[\"在同一包的类中访问\",\"在不同包的类中访问\",\"在本类中访问\",\"在同一文件的类中访问\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84454,
			"title": "下列关于类的描述中，错误的是（  ）。",
			"options": "[\"类可认为是一种高级数据类型\",\"可以将所有类成员的访问权限都设为私有权限\",\"类包含数据成员和函数成员\",\"用类所定义出的变量称为对象\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84455,
			"title": "下列关于重用代码的描述中，错误的是（  ）。",
			"options": "[\"类是一种数据类型，因此只能重用数据代码\",\"类是同时重用算法代码和数据代码的语法形式\",\"结构体类型是重用数据代码的语法形式\",\"函数是重用算法代码的语法形式\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84456,
			"title": "关于程序开发过程中的程序员角色，下列哪种描述是错误的？",
			"options": "[\"一个程序员可以为其他程序员提供代码，即代码提供者\",\"一个程序员不能既是代码提供者，同时又是代码使用者\",\"一个程序员可以使用其他程序员提供的代码，即代码使用者\",\"一个程序员可以既是代码提供者，同时又是代码使用者\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84457,
			"title": "关于程序设计方法，下列哪种描述是错误的？",
			"options": "[\"结构化程序设计分解出的函数是一种算法零件\",\"程序设计方法是研究如何对大型程序设计任务进行分解的方法\",\"结构化程序设计分解出的结构体类型是一种数据零件\",\"面向对象程序设计分解出的类是一种数据零件\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84458,
			"title": "下列哪种思想不属于面向对象程序设计？",
			"options": "[\"封装\",\"模块化\",\"继承\",\"抽象\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84459,
			"title": "下列关于类的描述中，错误的是（  ）。",
			"options": "[\"类是描述客观事物的数据模型\",\"可以用流程图来描述类的设计\",\"类的函数成员也被称作方法\",\"类的数据成员也被称作属性\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84460,
			"title": "绑定工作在编译连接阶段完成的情况称为静态绑定。",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84461,
			"title": "绑定工作在编译连接阶段完成的情况称为静态绑定。",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84462,
			"title": "类型兼容规则是指在需要基类对象的任何地方，都可以使用公有派生类的对象来替代。",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84463,
			"title": "直接访问就是直接利用变量的地址进行存取直接访问。",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84464,
			"title": "直接访问就是直接利用变量的地址进行存取直接访问。",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84465,
			"title": "用字符串方式赋值比用字符逐个赋值要多占一个字节， 用于存放字符串结束标志'?'。",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84466,
			"title": "用字符串方式赋值比用字符逐个赋值要多占一个字节， 用于存放字符串结束标志'?'。",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84467,
			"title": "浮点型常量的指数表示中 ,e 是可以省略的。",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84468,
			"title": "浮点型常量的指数表示中 ,e 是可以省略的。",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 84469,
			"title": "流是一种抽象，它负责在数据的生产者和数据的消费者之间建立联系，并管理数据的流动。",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-03-03 14:32:36",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		}
	]
}